delta

名词 n. 动词 v.
中文释义

英文释义

名词 n.
  1. The fourth letter of the modern Greek alphabet Δ, δ.
  2. A landform at the mouth of a river where it empties into a body of water.
    — Nile Delta
  3. Alternative letter-case form of Delta from the NATO/ICAO Phonetic Alphabet. alt-of
  4. The symbol Δ; A change in a quantity, likely from "d" for "difference".
    — ΔV - "delta vee"(change in velocity, used in rocketry and orbital mechanics)
  5. The rate of change in an option value with respect to the underlying asset's price.
  6. A value in delta notation indicating the relative abundances of isotopes.
  7. The set of differences between two versions of a file.
    — When you update the file, the system will only save the deltas.
  8. A small but noticeable effect. Compare epsilon. informal
    — This will slow the main code path down, but only by delta.
  9. The angle subtended at the center of a circular arc.
  10. A type of cargo bike that has one wheel in front and two in back.
  11. The closed figure produced by connecting three coils or circuits successively, end for end, especially in a three-phase system. attributive,often
    — delta winding; delta connection; delta current
  12. A military unit, nominally headed by a colonel, equivalent to a USAF operations wing, or an army regiment. Space-Force,US
  13. a star that is usually the fourth brightest of a constellation.
  14. one of four baryons consisting of up and down quarks with a combined spin of 3/2: Δ⁺⁺ (uuu), Δ⁺ (uud), Δ⁰ (udd), or Δ⁻ (ddd)
  15. Ellipsis of delta variant (variant of the SARS-CoV-2 virus). abbreviation,alt-of,ellipsis
动词 v.
  1. To calculate the differences between the characters in an enciphered text and the characters a fixed number of positions previous.
    — Turingery worked on deltaed key to produce the deltaed contribution of the chi-wheels. Turing's discovery that delta-ing would reveal information otherwise hidden was essential to the developments that followed.
  2. To compare two versions of the same file in order to determine where they differ (where a programmer has made edits).
    — The primary function of this command is to delta the product version file (if it has been retrieved for edit). However, prior to deltaing the product version file, the work source tree is searched to verify that no other source files are still waiting to be deltaed.

词形变化

deltas plural deltas present,singular,third-person deltaing participle,present deltaed participle,past deltaed past

词汇关系

上位词
baryon resonance
衍生词
antidelta correlation delta delta acid delta arrowhead delta blues delta cell delta connection deltacoronavirus Delta County deltacron delta decay delta female deltaform delta glider delta hinge deltaic delta iron deltal delta male delta metal delta particle delta ray delta-sigma converter delta strain deltate delta test delta time delta timing delta-v delta variant delta wing deltic Dirac delta Dirac delta function hepatitis delta virus inverted river delta Kronecker delta lava delta nondelta prodelta sigma-delta converter stimulus delta subdelta theta-delta
相关词
deltoid

词源

词源 1
From Ancient Greek δέλτα (délta), borrowed from a Phoenician word for "door", ultimately from Proto-Semitic *dalt-. Doublet of dalet.
* (river): from the triangular shape of the majuscule Greek letter delta Δ
* (USSF): from the delta wing, symbol of the USSF, a triangular wing, shaped like the majuscule Greek letter delta Δ
词源 2
From Ancient Greek δέλτα (délta), borrowed from a Phoenician word for "door", ultimately from Proto-Semitic *dalt-. Doublet of dalet.
* (river): from the triangular shape of the majuscule Greek letter delta Δ
* (USSF): from the delta wing, symbol of the USSF, a triangular wing, shaped like the majuscule Greek letter delta Δ
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